Yeah, I had the same debate, at the end of the day I could get the Micro for 1/3rd of the price of the MTM (more or less) and I wasn’t sure the advantages of the MTM were worth that premium. It also pushes them into a price bracket where they start to compete with e.g. the Neumann KH80, whereas the Micro seem to be in a league of their own for price/performance (discussed here: iLoud Micro vs. iLoud MTM - how much of an upgrade? - #5 by Monobear).
If I’m really happy with them (I’ve never used small monitors, but I can believe that modern DSP technology enables them to do some pretty impressive things) then maybe down the line I’ll look to upgrade to something more expensive… I figure I can always sell the Micros, or just keep them around as I’m sure they’d be useful now and then. (And if I’m not happy, they’ll go back to Amazon!)